我正在学习PHP并尝试编写一个小骰子循环。我想知道如何用更合适的语法重写它：
<?php
$rollcount = 1;
do {
$v = rand(1, 6);
$w = rand(1, 6);
$rollcount++;
echo "<p>$v, $w</p>";
}
while ($v != $w);
if ($v == $w) {
echo "<p>It took $rollcount turns until double!</p>";
} else {}
?>
如果它不执行任何操作，只需删除该 else 子句
else {}
你甚至不需要这句if语句，因为只有当它们都相等时，控制权才会到达那里。
<?php
$rollcount = 1;
do {
$v = rand(1, 6);
$w = rand(1, 6);
$rollcount++;
echo "<p>$v, $w</p>";
}
while ($v != $w);
echo "<p>It took $rollcount turns until double!</p>"; // that `if` was no needed here. Its implied.
?>
你不需要有一个 else 语句：
if ($v == $w) {
echo "<p>It took $rollcount turns until double!</p>";
}
如果事实上，除非它要执行一组特定的任务，否则你不应该有一个。
$rollcount = 0;
while(true){
++$rollcount;
$v = rand(1,6);
$w = rand(1,6);
echo "<p>".$v.", ".$w."</p>";
if($v === $w){
break;
}
}
echo "<p>It took ".$rollcount." turns until double!</p>";